Where did all the music games go?

Music games are in trouble. No, wait. Music games are doing great! No, wait. Music games are doing great in terms of sales, but are disastrously down in terms of revenue. No, wait--strike that, reverse it. No, wait...

Depending on whom you ask, you get a very different story about the health of the music game genre. Analysts, PR reps, and CEOs regularly throw around sales and revenue numbers that clearly can't all be right. It's enough to make you want to smash a plastic guitar, Pete Townshend-style. (Hey, at least replacing it would help out the genre. If it's in trouble. Which it isn't. Or is it?)